1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 86, 87, 88, 93, 94 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
31 #include "termhooks.h"
33 #include "dispextern.h"
40 #include "intervals.h"
46 #endif /* HAVE_X_WINDOWS */
48 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
53 #define max(a, b) ((a) > (b) ? (a) : (b))
54 #define min(a, b) ((a) < (b) ? (a) : (b))
56 /* Get number of chars of output now in the buffer of a stdio stream.
57 This ought to be built in in stdio, but it isn't.
58 Some s- files override this because their stdio internals differ. */
59 #ifdef __GNU_LIBRARY__
60 /* The s- file might have overridden the definition with one that works for
61 the system's C library. But we are using the GNU C library, so this is
62 the right definition for every system. */
63 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
64 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
66 #undef PENDING_OUTPUT_COUNT
67 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
69 #else /* not __GNU_LIBRARY__ */
70 #ifndef PENDING_OUTPUT_COUNT
71 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
75 static void change_frame_size_1 ();
77 /* Nonzero upon entry to redisplay means do not assume anything about
78 current contents of actual terminal frame; clear and redraw it. */
82 /* Nonzero means last display completed. Zero means it was preempted. */
84 int display_completed
;
86 /* Lisp variable visible-bell; enables use of screen-flash
87 instead of audible bell. */
91 /* Invert the color of the whole frame, at a low level. */
95 /* Line speed of the terminal. */
99 /* nil or a symbol naming the window system under which emacs is
100 running ('x is the only current possibility). */
102 Lisp_Object Vwindow_system
;
104 /* Version number of X windows: 10, 11 or nil. */
105 Lisp_Object Vwindow_system_version
;
107 /* Vector of glyph definitions. Indexed by glyph number,
108 the contents are a string which is how to output the glyph.
110 If Vglyph_table is nil, a glyph is output by using its low 8 bits
111 as a character code. */
113 Lisp_Object Vglyph_table
;
115 /* Display table to use for vectors that don't specify their own. */
117 Lisp_Object Vstandard_display_table
;
119 /* Nonzero means reading single-character input with prompt
120 so put cursor on minibuffer after the prompt.
121 positive means at end of text in echo area;
122 negative means at beginning of line. */
123 int cursor_in_echo_area
;
125 /* The currently selected frame.
126 In a single-frame version, this variable always holds the address of
129 FRAME_PTR selected_frame
;
131 /* A frame which is not just a minibuffer, or 0 if there are no such
132 frames. This is usually the most recent such frame that was
133 selected. In a single-frame version, this variable always holds
134 the address of the_only_frame. */
135 FRAME_PTR last_nonminibuf_frame
;
137 /* In a single-frame version, the information that would otherwise
138 exist inside frame objects lives in the following structure instead.
140 NOTE: the_only_frame is not checked for garbage collection; don't
141 store collectible objects in any of its fields!
143 You're not/The only frame in town/... */
146 struct frame the_only_frame
;
149 /* This is a vector, made larger whenever it isn't large enough,
150 which is used inside `update_frame' to hold the old contents
151 of the FRAME_PHYS_LINES of the frame being updated. */
152 struct frame_glyphs
**ophys_lines
;
153 /* Length of vector currently allocated. */
154 int ophys_lines_length
;
156 FILE *termscript
; /* Stdio stream being used for copy of all output. */
158 struct cm Wcm
; /* Structure for info on cursor positioning */
160 extern short ospeed
; /* Output speed (from sg_ospeed) */
162 int delayed_size_change
; /* 1 means SIGWINCH happened when not safe. */
166 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
167 "Clear frame FRAME and output again what is supposed to appear on it.")
173 CHECK_LIVE_FRAME (frame
, 0);
176 /* set_terminal_modes (); */
178 clear_frame_records (f
);
181 windows_or_buffers_changed
++;
182 /* Mark all windows as INaccurate,
183 so that every window will have its redisplay done. */
184 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
193 XSETFRAME (frame
, f
);
194 Fredraw_frame (frame
);
199 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
200 "Clear frame FRAME and output again what is supposed to appear on it.")
205 set_terminal_modes ();
209 clear_frame_records (0);
210 windows_or_buffers_changed
++;
211 /* Mark all windows as INaccurate,
212 so that every window will have its redisplay done. */
213 mark_window_display_accurate (FRAME_ROOT_WINDOW (0), 0);
219 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
220 "Clear and redisplay all visible frames.")
223 Lisp_Object tail
, frame
;
225 FOR_EACH_FRAME (tail
, frame
)
226 if (FRAME_VISIBLE_P (XFRAME (frame
)))
227 Fredraw_frame (frame
);
232 /* This is used when frame_garbaged is set.
233 Redraw the individual frames marked as garbaged. */
236 redraw_garbaged_frames ()
238 Lisp_Object tail
, frame
;
240 FOR_EACH_FRAME (tail
, frame
)
241 if (FRAME_VISIBLE_P (XFRAME (frame
))
242 && FRAME_GARBAGED_P (XFRAME (frame
)))
243 Fredraw_frame (frame
);
247 static struct frame_glyphs
*
248 make_frame_glyphs (frame
, empty
)
249 register FRAME_PTR frame
;
253 register width
= FRAME_WIDTH (frame
);
254 register height
= FRAME_HEIGHT (frame
);
255 register struct frame_glyphs
*new
256 = (struct frame_glyphs
*) xmalloc (sizeof (struct frame_glyphs
));
258 SET_GLYPHS_FRAME (new, frame
);
259 new->height
= height
;
261 new->used
= (int *) xmalloc (height
* sizeof (int));
262 new->glyphs
= (GLYPH
**) xmalloc (height
* sizeof (GLYPH
*));
263 new->charstarts
= (int **) xmalloc (height
* sizeof (int *));
264 new->highlight
= (char *) xmalloc (height
* sizeof (char));
265 new->enable
= (char *) xmalloc (height
* sizeof (char));
266 bzero (new->enable
, height
* sizeof (char));
267 new->bufp
= (int *) xmalloc (height
* sizeof (int));
269 #ifdef HAVE_X_WINDOWS
270 if (FRAME_X_P (frame
))
272 new->top_left_x
= (short *) xmalloc (height
* sizeof (short));
273 new->top_left_y
= (short *) xmalloc (height
* sizeof (short));
274 new->pix_width
= (short *) xmalloc (height
* sizeof (short));
275 new->pix_height
= (short *) xmalloc (height
* sizeof (short));
276 new->max_ascent
= (short *) xmalloc (height
* sizeof (short));
282 /* Make the buffer used by decode_mode_spec. This buffer is also
283 used as temporary storage when updating the frame. See scroll.c. */
284 unsigned int total_glyphs
= (width
+ 2) * sizeof (GLYPH
);
285 unsigned int total_charstarts
= (width
+ 2) * sizeof (int);
287 new->total_contents
= (GLYPH
*) xmalloc (total_glyphs
);
288 bzero (new->total_contents
, total_glyphs
);
290 new->total_charstarts
= (int *) xmalloc (total_charstarts
);
291 bzero (new->total_charstarts
, total_glyphs
);
295 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (GLYPH
);
297 new->total_contents
= (GLYPH
*) xmalloc (total_glyphs
);
298 bzero (new->total_contents
, total_glyphs
);
299 for (i
= 0; i
< height
; i
++)
300 new->glyphs
[i
] = new->total_contents
+ i
* (width
+ 2) + 1;
302 if (!FRAME_TERMCAP_P (frame
))
304 unsigned int total_charstarts
= height
* (width
+ 2) * sizeof (int);
306 new->total_charstarts
= (int *) xmalloc (total_charstarts
);
307 bzero (new->total_charstarts
, total_charstarts
);
308 for (i
= 0; i
< height
; i
++)
309 new->charstarts
[i
] = new->total_charstarts
+ i
* (width
+ 2) + 1;
313 /* Without a window system, we don't really need charstarts.
314 So use a small amount of space to make enough data structure
315 to prevent crashes in display_text_line. */
316 new->total_charstarts
= (int *) xmalloc ((width
+ 2) * sizeof (int));
317 for (i
= 0; i
< height
; i
++)
318 new->charstarts
[i
] = new->total_charstarts
;
326 free_frame_glyphs (frame
, glyphs
)
328 struct frame_glyphs
*glyphs
;
330 if (glyphs
->total_contents
)
331 xfree (glyphs
->total_contents
);
332 if (glyphs
->total_charstarts
)
333 xfree (glyphs
->total_charstarts
);
335 xfree (glyphs
->used
);
336 xfree (glyphs
->glyphs
);
337 xfree (glyphs
->highlight
);
338 xfree (glyphs
->enable
);
339 xfree (glyphs
->bufp
);
340 if (glyphs
->charstarts
)
341 xfree (glyphs
->charstarts
);
343 #ifdef HAVE_X_WINDOWS
344 if (FRAME_X_P (frame
))
346 xfree (glyphs
->top_left_x
);
347 xfree (glyphs
->top_left_y
);
348 xfree (glyphs
->pix_width
);
349 xfree (glyphs
->pix_height
);
350 xfree (glyphs
->max_ascent
);
358 remake_frame_glyphs (frame
)
361 if (FRAME_CURRENT_GLYPHS (frame
))
362 free_frame_glyphs (frame
, FRAME_CURRENT_GLYPHS (frame
));
363 if (FRAME_DESIRED_GLYPHS (frame
))
364 free_frame_glyphs (frame
, FRAME_DESIRED_GLYPHS (frame
));
365 if (FRAME_TEMP_GLYPHS (frame
))
366 free_frame_glyphs (frame
, FRAME_TEMP_GLYPHS (frame
));
368 if (FRAME_MESSAGE_BUF (frame
))
370 /* Reallocate the frame's message buffer; remember that
371 echo_area_glyphs may be pointing here. */
372 char *old_message_buf
= FRAME_MESSAGE_BUF (frame
);
374 FRAME_MESSAGE_BUF (frame
)
375 = (char *) xrealloc (FRAME_MESSAGE_BUF (frame
),
376 FRAME_WIDTH (frame
) + 1);
378 if (echo_area_glyphs
== old_message_buf
)
379 echo_area_glyphs
= FRAME_MESSAGE_BUF (frame
);
380 if (previous_echo_glyphs
== old_message_buf
)
381 previous_echo_glyphs
= FRAME_MESSAGE_BUF (frame
);
384 FRAME_MESSAGE_BUF (frame
)
385 = (char *) xmalloc (FRAME_WIDTH (frame
) + 1);
387 FRAME_CURRENT_GLYPHS (frame
) = make_frame_glyphs (frame
, 0);
388 FRAME_DESIRED_GLYPHS (frame
) = make_frame_glyphs (frame
, 0);
389 FRAME_TEMP_GLYPHS (frame
) = make_frame_glyphs (frame
, 1);
390 if (! FRAME_TERMCAP_P (frame
) || frame
== selected_frame
)
391 SET_FRAME_GARBAGED (frame
);
394 /* Return the hash code of contents of line VPOS in frame-matrix M. */
397 line_hash_code (m
, vpos
)
398 register struct frame_glyphs
*m
;
401 register GLYPH
*body
, *end
;
404 if (!m
->enable
[vpos
])
407 /* Give all highlighted lines the same hash code
408 so as to encourage scrolling to leave them in place. */
409 if (m
->highlight
[vpos
])
412 body
= m
->glyphs
[vpos
];
414 if (must_write_spaces
)
421 h
= (((h
<< 4) + (h
>> 24)) & 0x0fffffff) + g
- SPACEGLYPH
;
430 h
= (((h
<< 4) + (h
>> 24)) & 0x0fffffff) + g
;
438 /* Return number of characters in line in M at vpos VPOS,
439 except don't count leading and trailing spaces
440 unless the terminal requires those to be explicitly output. */
443 line_draw_cost (m
, vpos
)
444 struct frame_glyphs
*m
;
447 register GLYPH
*beg
= m
->glyphs
[vpos
];
448 register GLYPH
*end
= m
->glyphs
[vpos
] + m
->used
[vpos
];
450 register int tlen
= GLYPH_TABLE_LENGTH
;
451 register Lisp_Object
*tbase
= GLYPH_TABLE_BASE
;
453 /* Ignore trailing and leading spaces if we can. */
454 if (!must_write_spaces
)
456 while ((end
!= beg
) && (*end
== SPACEGLYPH
))
459 return (0); /* All blank line. */
461 while (*beg
== SPACEGLYPH
)
465 /* If we don't have a glyph-table, each glyph is one character,
466 so return the number of glyphs. */
470 /* Otherwise, scan the glyphs and accumulate their total size in I. */
472 while ((beg
<= end
) && *beg
)
474 register GLYPH g
= *beg
++;
476 if (GLYPH_SIMPLE_P (tbase
, tlen
, g
))
479 i
+= GLYPH_LENGTH (tbase
, g
);
484 /* The functions on this page are the interface from xdisp.c to redisplay.
486 The only other interface into redisplay is through setting
487 FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame)
488 and SET_FRAME_GARBAGED (frame). */
490 /* cancel_line eliminates any request to display a line at position `vpos' */
492 cancel_line (vpos
, frame
)
494 register FRAME_PTR frame
;
496 FRAME_DESIRED_GLYPHS (frame
)->enable
[vpos
] = 0;
499 clear_frame_records (frame
)
500 register FRAME_PTR frame
;
502 bzero (FRAME_CURRENT_GLYPHS (frame
)->enable
, FRAME_HEIGHT (frame
));
505 /* Prepare to display on line VPOS starting at HPOS within it. */
508 get_display_line (frame
, vpos
, hpos
)
509 register FRAME_PTR frame
;
513 register struct frame_glyphs
*glyphs
;
514 register struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (frame
);
520 if ((desired_glyphs
->enable
[vpos
]) && desired_glyphs
->used
[vpos
] > hpos
)
523 if (! desired_glyphs
->enable
[vpos
])
525 desired_glyphs
->used
[vpos
] = 0;
526 desired_glyphs
->highlight
[vpos
] = 0;
527 desired_glyphs
->enable
[vpos
] = 1;
530 if (hpos
> desired_glyphs
->used
[vpos
])
532 GLYPH
*g
= desired_glyphs
->glyphs
[vpos
] + desired_glyphs
->used
[vpos
];
533 GLYPH
*end
= desired_glyphs
->glyphs
[vpos
] + hpos
;
535 desired_glyphs
->used
[vpos
] = hpos
;
541 /* Like bcopy except never gets confused by overlap. */
544 safe_bcopy (from
, to
, size
)
548 if (size
<= 0 || from
== to
)
551 /* If the source and destination don't overlap, then bcopy can
552 handle it. If they do overlap, but the destination is lower in
553 memory than the source, we'll assume bcopy can handle that. */
554 if (to
< from
|| from
+ size
<= to
)
555 bcopy (from
, to
, size
);
557 /* Otherwise, we'll copy from the end. */
560 register char *endf
= from
+ size
;
561 register char *endt
= to
+ size
;
563 /* If TO - FROM is large, then we should break the copy into
564 nonoverlapping chunks of TO - FROM bytes each. However, if
565 TO - FROM is small, then the bcopy function call overhead
566 makes this not worth it. The crossover point could be about
567 anywhere. Since I don't think the obvious copy loop is too
568 bad, I'm trying to err in its favor. */
573 while (endf
!= from
);
585 bcopy (endf
, endt
, to
- from
);
588 /* If SIZE wasn't a multiple of TO - FROM, there will be a
589 little left over. The amount left over is
590 (endt + (to - from)) - to, which is endt - from. */
591 bcopy (from
, to
, endt
- from
);
596 /* Rotate a vector of SIZE bytes right, by DISTANCE bytes.
597 DISTANCE may be negative. */
600 rotate_vector (vector
, size
, distance
)
605 char *temp
= (char *) alloca (size
);
610 bcopy (vector
, temp
+ distance
, size
- distance
);
611 bcopy (vector
+ size
- distance
, temp
, distance
);
612 bcopy (temp
, vector
, size
);
615 /* Scroll lines from vpos FROM up to but not including vpos END
616 down by AMOUNT lines (AMOUNT may be negative).
617 Returns nonzero if done, zero if terminal cannot scroll them. */
620 scroll_frame_lines (frame
, from
, end
, amount
, newpos
)
621 register FRAME_PTR frame
;
622 int from
, end
, amount
, newpos
;
625 register struct frame_glyphs
*current_frame
626 = FRAME_CURRENT_GLYPHS (frame
);
628 int width
= FRAME_WIDTH (frame
);
630 if (!line_ins_del_ok
)
638 update_begin (frame
);
639 set_terminal_window (end
+ amount
);
640 if (!scroll_region_ok
)
641 ins_del_lines (end
, -amount
);
642 ins_del_lines (from
, amount
);
643 set_terminal_window (0);
645 rotate_vector (current_frame
->glyphs
+ from
,
646 sizeof (GLYPH
*) * (end
+ amount
- from
),
647 amount
* sizeof (GLYPH
*));
649 rotate_vector (current_frame
->charstarts
+ from
,
650 sizeof (int *) * (end
+ amount
- from
),
651 amount
* sizeof (int *));
653 safe_bcopy (current_frame
->used
+ from
,
654 current_frame
->used
+ from
+ amount
,
655 (end
- from
) * sizeof current_frame
->used
[0]);
657 safe_bcopy (current_frame
->highlight
+ from
,
658 current_frame
->highlight
+ from
+ amount
,
659 (end
- from
) * sizeof current_frame
->highlight
[0]);
661 safe_bcopy (current_frame
->enable
+ from
,
662 current_frame
->enable
+ from
+ amount
,
663 (end
- from
) * sizeof current_frame
->enable
[0]);
665 /* Adjust the lines by an amount
666 that puts the first of them at NEWPOS. */
667 pos_adjust
= newpos
- current_frame
->charstarts
[from
+ amount
][0];
669 /* Offset each char position in the charstarts lines we moved
671 for (i
= from
+ amount
; i
< end
+ amount
; i
++)
673 int *line
= current_frame
->charstarts
[i
];
675 for (col
= 0; col
< width
; col
++)
677 line
[col
] += pos_adjust
;
679 for (i
= from
; i
< from
+ amount
; i
++)
681 int *line
= current_frame
->charstarts
[i
];
684 for (col
= 0; col
< width
; col
++)
688 /* Mark the lines made empty by scrolling as enabled, empty and
690 bzero (current_frame
->used
+ from
,
691 amount
* sizeof current_frame
->used
[0]);
692 bzero (current_frame
->highlight
+ from
,
693 amount
* sizeof current_frame
->highlight
[0]);
694 for (i
= from
; i
< from
+ amount
; i
++)
696 current_frame
->glyphs
[i
][0] = '\0';
697 current_frame
->charstarts
[i
][0] = -1;
698 current_frame
->enable
[i
] = 1;
701 safe_bcopy (current_frame
->bufp
+ from
,
702 current_frame
->bufp
+ from
+ amount
,
703 (end
- from
) * sizeof current_frame
->bufp
[0]);
705 #ifdef HAVE_X_WINDOWS
706 if (FRAME_X_P (frame
))
708 safe_bcopy (current_frame
->top_left_x
+ from
,
709 current_frame
->top_left_x
+ from
+ amount
,
710 (end
- from
) * sizeof current_frame
->top_left_x
[0]);
712 safe_bcopy (current_frame
->top_left_y
+ from
,
713 current_frame
->top_left_y
+ from
+ amount
,
714 (end
- from
) * sizeof current_frame
->top_left_y
[0]);
716 safe_bcopy (current_frame
->pix_width
+ from
,
717 current_frame
->pix_width
+ from
+ amount
,
718 (end
- from
) * sizeof current_frame
->pix_width
[0]);
720 safe_bcopy (current_frame
->pix_height
+ from
,
721 current_frame
->pix_height
+ from
+ amount
,
722 (end
- from
) * sizeof current_frame
->pix_height
[0]);
724 safe_bcopy (current_frame
->max_ascent
+ from
,
725 current_frame
->max_ascent
+ from
+ amount
,
726 (end
- from
) * sizeof current_frame
->max_ascent
[0]);
728 #endif /* HAVE_X_WINDOWS */
734 update_begin (frame
);
735 set_terminal_window (end
);
736 ins_del_lines (from
+ amount
, amount
);
737 if (!scroll_region_ok
)
738 ins_del_lines (end
+ amount
, -amount
);
739 set_terminal_window (0);
741 rotate_vector (current_frame
->glyphs
+ from
+ amount
,
742 sizeof (GLYPH
*) * (end
- from
- amount
),
743 amount
* sizeof (GLYPH
*));
745 rotate_vector (current_frame
->charstarts
+ from
+ amount
,
746 sizeof (int *) * (end
- from
- amount
),
747 amount
* sizeof (int *));
749 safe_bcopy (current_frame
->used
+ from
,
750 current_frame
->used
+ from
+ amount
,
751 (end
- from
) * sizeof current_frame
->used
[0]);
753 safe_bcopy (current_frame
->highlight
+ from
,
754 current_frame
->highlight
+ from
+ amount
,
755 (end
- from
) * sizeof current_frame
->highlight
[0]);
757 safe_bcopy (current_frame
->enable
+ from
,
758 current_frame
->enable
+ from
+ amount
,
759 (end
- from
) * sizeof current_frame
->enable
[0]);
761 /* Adjust the lines by an amount
762 that puts the first of them at NEWPOS. */
763 pos_adjust
= newpos
- current_frame
->charstarts
[from
+ amount
][0];
765 /* Offset each char position in the charstarts lines we moved
767 for (i
= from
+ amount
; i
< end
+ amount
; i
++)
769 int *line
= current_frame
->charstarts
[i
];
771 for (col
= 0; col
< width
; col
++)
773 line
[col
] += pos_adjust
;
775 for (i
= end
+ amount
; i
< end
; i
++)
777 int *line
= current_frame
->charstarts
[i
];
780 for (col
= 0; col
< width
; col
++)
784 /* Mark the lines made empty by scrolling as enabled, empty and
786 bzero (current_frame
->used
+ end
+ amount
,
787 - amount
* sizeof current_frame
->used
[0]);
788 bzero (current_frame
->highlight
+ end
+ amount
,
789 - amount
* sizeof current_frame
->highlight
[0]);
790 for (i
= end
+ amount
; i
< end
; i
++)
792 current_frame
->glyphs
[i
][0] = '\0';
793 current_frame
->charstarts
[i
][0] = 0;
794 current_frame
->enable
[i
] = 1;
797 safe_bcopy (current_frame
->bufp
+ from
,
798 current_frame
->bufp
+ from
+ amount
,
799 (end
- from
) * sizeof current_frame
->bufp
[0]);
801 #ifdef HAVE_X_WINDOWS
802 if (FRAME_X_P (frame
))
804 safe_bcopy (current_frame
->top_left_x
+ from
,
805 current_frame
->top_left_x
+ from
+ amount
,
806 (end
- from
) * sizeof current_frame
->top_left_x
[0]);
808 safe_bcopy (current_frame
->top_left_y
+ from
,
809 current_frame
->top_left_y
+ from
+ amount
,
810 (end
- from
) * sizeof current_frame
->top_left_y
[0]);
812 safe_bcopy (current_frame
->pix_width
+ from
,
813 current_frame
->pix_width
+ from
+ amount
,
814 (end
- from
) * sizeof current_frame
->pix_width
[0]);
816 safe_bcopy (current_frame
->pix_height
+ from
,
817 current_frame
->pix_height
+ from
+ amount
,
818 (end
- from
) * sizeof current_frame
->pix_height
[0]);
820 safe_bcopy (current_frame
->max_ascent
+ from
,
821 current_frame
->max_ascent
+ from
+ amount
,
822 (end
- from
) * sizeof current_frame
->max_ascent
[0]);
824 #endif /* HAVE_X_WINDOWS */
831 /* After updating a window W that isn't the full frame wide,
832 copy all the columns that W does not occupy
833 into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame)
834 so that update_frame will not change those columns. */
836 preserve_other_columns (w
)
840 register struct frame_glyphs
*current_frame
, *desired_frame
;
841 register FRAME_PTR frame
= XFRAME (w
->frame
);
842 int start
= XFASTINT (w
->left
);
843 int end
= XFASTINT (w
->left
) + XFASTINT (w
->width
);
844 int bot
= XFASTINT (w
->top
) + XFASTINT (w
->height
);
846 current_frame
= FRAME_CURRENT_GLYPHS (frame
);
847 desired_frame
= FRAME_DESIRED_GLYPHS (frame
);
849 for (vpos
= XFASTINT (w
->top
); vpos
< bot
; vpos
++)
851 if (current_frame
->enable
[vpos
] && desired_frame
->enable
[vpos
])
857 bcopy (current_frame
->glyphs
[vpos
],
858 desired_frame
->glyphs
[vpos
],
859 start
* sizeof (current_frame
->glyphs
[vpos
][0]));
860 bcopy (current_frame
->charstarts
[vpos
],
861 desired_frame
->charstarts
[vpos
],
862 start
* sizeof (current_frame
->charstarts
[vpos
][0]));
863 len
= min (start
, current_frame
->used
[vpos
]);
864 if (desired_frame
->used
[vpos
] < len
)
865 desired_frame
->used
[vpos
] = len
;
867 if (current_frame
->used
[vpos
] > end
868 && desired_frame
->used
[vpos
] < current_frame
->used
[vpos
])
870 while (desired_frame
->used
[vpos
] < end
)
872 int used
= desired_frame
->used
[vpos
]++;
873 desired_frame
->glyphs
[vpos
][used
] = SPACEGLYPH
;
874 desired_frame
->glyphs
[vpos
][used
] = 0;
876 bcopy (current_frame
->glyphs
[vpos
] + end
,
877 desired_frame
->glyphs
[vpos
] + end
,
878 ((current_frame
->used
[vpos
] - end
)
879 * sizeof (current_frame
->glyphs
[vpos
][0])));
880 bcopy (current_frame
->charstarts
[vpos
] + end
,
881 desired_frame
->charstarts
[vpos
] + end
,
882 ((current_frame
->used
[vpos
] - end
)
883 * sizeof (current_frame
->charstarts
[vpos
][0])));
884 desired_frame
->used
[vpos
] = current_frame
->used
[vpos
];
892 /* If window w does not need to be updated and isn't the full frame wide,
893 copy all the columns that w does occupy
894 into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame)
895 so that update_frame will not change those columns.
897 Have not been able to figure out how to use this correctly. */
899 preserve_my_columns (w
)
902 register int vpos
, fin
;
903 register struct frame_glyphs
*l1
, *l2
;
904 register FRAME_PTR frame
= XFRAME (w
->frame
);
905 int start
= XFASTINT (w
->left
);
906 int end
= XFASTINT (w
->left
) + XFASTINT (w
->width
);
907 int bot
= XFASTINT (w
->top
) + XFASTINT (w
->height
);
909 for (vpos
= XFASTINT (w
->top
); vpos
< bot
; vpos
++)
911 if ((l1
= FRAME_DESIRED_GLYPHS (frame
)->glyphs
[vpos
+ 1])
912 && (l2
= FRAME_PHYS_GLYPHS (frame
)->glyphs
[vpos
+ 1]))
914 if (l2
->length
> start
&& l1
->length
< l2
->length
)
917 if (fin
> end
) fin
= end
;
918 while (l1
->length
< start
)
919 l1
->body
[l1
->length
++] = ' ';
920 bcopy (l2
->body
+ start
, l1
->body
+ start
, fin
- start
);
929 /* Adjust by ADJUST the charstart values in window W
930 after vpos VPOS, which counts relative to the frame
931 (not relative to W itself). */
934 adjust_window_charstarts (w
, vpos
, adjust
)
939 int left
= XFASTINT (w
->left
);
940 int top
= XFASTINT (w
->top
);
941 int right
= left
+ window_internal_width (w
);
942 int bottom
= top
+ window_internal_height (w
);
945 for (i
= vpos
+ 1; i
< bottom
; i
++)
948 = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w
)))->charstarts
[i
];
950 for (j
= left
; j
< right
; j
++)
951 if (charstart
[j
] > 0)
952 charstart
[j
] += adjust
;
956 /* Check the charstarts values in the area of window W
957 for internal consistency. We cannot check that they are "right";
958 we can only look for something nonsensical. */
960 verify_charstarts (w
)
963 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
965 int top
= XFASTINT (w
->top
);
966 int bottom
= top
+ window_internal_height (w
);
967 int left
= XFASTINT (w
->left
);
968 int right
= left
+ window_internal_width (w
);
970 int truncate
= (XINT (w
->hscroll
)
971 || (truncate_partial_width_windows
972 && (XFASTINT (w
->width
) < FRAME_WIDTH (f
)))
973 || !NILP (XBUFFER (w
->buffer
)->truncate_lines
));
975 for (i
= top
; i
< bottom
; i
++)
979 int *charstart
= FRAME_CURRENT_GLYPHS (f
)->charstarts
[i
];
985 /* If we are truncating lines, allow a jump
986 in charstarts from one line to the next. */
987 if (charstart
[left
] < next_line
)
992 if (charstart
[left
] != next_line
)
997 for (j
= left
; j
< right
; j
++)
998 if (charstart
[j
] > 0)
1000 /* Record where the next line should start. */
1002 if (BUF_ZV (XBUFFER (w
->buffer
)) != last
)
1004 /* If there's a newline between the two lines, count that. */
1005 int endchar
= *BUF_CHAR_ADDRESS (XBUFFER (w
->buffer
), last
);
1006 if (endchar
== '\n')
1012 /* On discovering that the redisplay for a window was no good,
1013 cancel the columns of that window, so that when the window is
1014 displayed over again get_display_line will not complain. */
1016 cancel_my_columns (w
)
1020 register struct frame_glyphs
*desired_glyphs
1021 = FRAME_DESIRED_GLYPHS (XFRAME (w
->frame
));
1022 register int start
= XFASTINT (w
->left
);
1023 register int bot
= XFASTINT (w
->top
) + XFASTINT (w
->height
);
1025 for (vpos
= XFASTINT (w
->top
); vpos
< bot
; vpos
++)
1026 if (desired_glyphs
->enable
[vpos
]
1027 && desired_glyphs
->used
[vpos
] >= start
)
1028 desired_glyphs
->used
[vpos
] = start
;
1031 /* These functions try to perform directly and immediately on the frame
1032 the necessary output for one change in the buffer.
1033 They may return 0 meaning nothing was done if anything is difficult,
1034 or 1 meaning the output was performed properly.
1035 They assume that the frame was up to date before the buffer
1036 change being displayed. They make various other assumptions too;
1037 see command_loop_1 where these are called. */
1040 direct_output_for_insert (g
)
1043 register FRAME_PTR frame
= selected_frame
;
1044 register struct frame_glyphs
*current_frame
1045 = FRAME_CURRENT_GLYPHS (frame
);
1047 #ifndef COMPILER_REGISTER_BUG
1049 #endif /* COMPILER_REGISTER_BUG */
1050 struct window
*w
= XWINDOW (selected_window
);
1051 #ifndef COMPILER_REGISTER_BUG
1053 #endif /* COMPILER_REGISTER_BUG */
1054 int hpos
= FRAME_CURSOR_X (frame
);
1055 #ifndef COMPILER_REGISTER_BUG
1057 #endif /* COMPILER_REGISTER_BUG */
1058 int vpos
= FRAME_CURSOR_Y (frame
);
1060 /* Give up if about to continue line. */
1061 if (hpos
>= XFASTINT (w
->left
) + window_internal_width (w
) - 1
1063 /* Avoid losing if cursor is in invisible text off left margin */
1064 || (XINT (w
->hscroll
) && hpos
== XFASTINT (w
->left
))
1066 /* Give up if cursor outside window (in minibuf, probably) */
1067 || cursor_in_echo_area
1068 || FRAME_CURSOR_Y (frame
) < XFASTINT (w
->top
)
1069 || FRAME_CURSOR_Y (frame
) >= XFASTINT (w
->top
) + XFASTINT (w
->height
)
1071 /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */
1072 || !display_completed
1074 /* Give up if buffer appears in two places. */
1075 || buffer_shared
> 1
1077 #ifdef USE_TEXT_PROPERTIES
1078 /* Intervals have already been adjusted, point is after the
1079 character that was just inserted. */
1080 /* Give up if character is invisible. */
1081 /* Give up if character has a face property.
1082 At the moment we only lose at end of line or end of buffer
1083 and only with faces that have some background */
1084 /* Instead of wasting time, give up if character has any text properties */
1085 || ! NILP (Ftext_properties_at (make_number (point
- 1), Qnil
))
1088 /* Give up if w is minibuffer and a message is being displayed there */
1089 || (MINI_WINDOW_P (w
) && echo_area_glyphs
))
1097 if (FRAME_X_P (frame
))
1098 face
= compute_char_face (frame
, w
, point
- 1, -1, -1, &dummy
, point
, 0);
1100 current_frame
->glyphs
[vpos
][hpos
] = MAKE_GLYPH (frame
, g
, face
);
1101 current_frame
->charstarts
[vpos
][hpos
] = point
- 1;
1102 /* Record the entry for after the newly inserted character. */
1103 current_frame
->charstarts
[vpos
][hpos
+ 1] = point
;
1104 adjust_window_charstarts (w
, vpos
, 1);
1106 unchanged_modified
= MODIFF
;
1107 beg_unchanged
= GPT
- BEG
;
1108 XSETFASTINT (w
->last_point
, point
);
1109 XSETFASTINT (w
->last_point_x
, hpos
);
1110 XSETFASTINT (w
->last_modified
, MODIFF
);
1112 reassert_line_highlight (0, vpos
);
1113 write_glyphs (¤t_frame
->glyphs
[vpos
][hpos
], 1);
1115 ++FRAME_CURSOR_X (frame
);
1116 if (hpos
== current_frame
->used
[vpos
])
1118 current_frame
->used
[vpos
] = hpos
+ 1;
1119 current_frame
->glyphs
[vpos
][hpos
+ 1] = 0;
1126 direct_output_forward_char (n
)
1129 register FRAME_PTR frame
= selected_frame
;
1130 register struct window
*w
= XWINDOW (selected_window
);
1131 Lisp_Object position
;
1132 int hpos
= FRAME_CURSOR_X (frame
);
1134 /* Give up if in truncated text at end of line. */
1135 if (hpos
>= XFASTINT (w
->left
) + window_internal_width (w
) - 1)
1138 /* Avoid losing if cursor is in invisible text off left margin
1139 or about to go off either side of window. */
1140 if ((FRAME_CURSOR_X (frame
) == XFASTINT (w
->left
)
1141 && (XINT (w
->hscroll
) || n
< 0))
1143 && (FRAME_CURSOR_X (frame
) + 1 >= window_internal_width (w
) - 1))
1144 || cursor_in_echo_area
)
1147 /* Can't use direct output if highlighting a region. */
1148 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
1151 #ifdef USE_TEXT_PROPERTIES
1152 /* Don't use direct output next to an invisible character
1153 since we might need to do something special. */
1155 XSETFASTINT (position
, point
);
1156 if (XFASTINT (position
) < ZV
1157 && ! NILP (Fget_char_property (position
,
1162 XSETFASTINT (position
, point
- 1);
1163 if (XFASTINT (position
) >= BEGV
1164 && ! NILP (Fget_char_property (position
,
1170 FRAME_CURSOR_X (frame
) += n
;
1171 XSETFASTINT (w
->last_point_x
, FRAME_CURSOR_X (frame
));
1172 XSETFASTINT (w
->last_point
, point
);
1173 cursor_to (FRAME_CURSOR_Y (frame
), FRAME_CURSOR_X (frame
));
1179 static void update_line ();
1181 /* Update frame F based on the data in FRAME_DESIRED_GLYPHS.
1182 Value is nonzero if redisplay stopped due to pending input.
1183 FORCE nonzero means do not stop for pending input. */
1186 update_frame (f
, force
, inhibit_hairy_id
)
1189 int inhibit_hairy_id
;
1191 register struct frame_glyphs
*current_frame
;
1192 register struct frame_glyphs
*desired_frame
= 0;
1195 int preempt_count
= baud_rate
/ 2400 + 1;
1196 extern input_pending
;
1197 #ifdef HAVE_X_WINDOWS
1198 register int downto
, leftmost
;
1201 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
1202 calculate_costs (f
);
1204 if (preempt_count
<= 0)
1207 if (FRAME_HEIGHT (f
) == 0) abort (); /* Some bug zeros some core */
1209 detect_input_pending ();
1210 if (input_pending
&& !force
)
1218 if (!line_ins_del_ok
)
1219 inhibit_hairy_id
= 1;
1221 /* These are separate to avoid a possible bug in the AIX C compiler. */
1222 current_frame
= FRAME_CURRENT_GLYPHS (f
);
1223 desired_frame
= FRAME_DESIRED_GLYPHS (f
);
1225 /* See if any of the desired lines are enabled; don't compute for
1226 i/d line if just want cursor motion. */
1227 for (i
= 0; i
< FRAME_HEIGHT (f
); i
++)
1228 if (desired_frame
->enable
[i
])
1231 /* Try doing i/d line, if not yet inhibited. */
1232 if (!inhibit_hairy_id
&& i
< FRAME_HEIGHT (f
))
1233 force
|= scrolling (f
);
1235 /* Update the individual lines as needed. Do bottom line first. */
1237 if (desired_frame
->enable
[FRAME_HEIGHT (f
) - 1])
1238 update_line (f
, FRAME_HEIGHT (f
) - 1);
1240 #ifdef HAVE_X_WINDOWS
1243 leftmost
= downto
= f
->display
.x
->internal_border_width
;
1244 if (desired_frame
->enable
[0])
1246 current_frame
->top_left_x
[FRAME_HEIGHT (f
) - 1] = leftmost
;
1247 current_frame
->top_left_y
[FRAME_HEIGHT (f
) - 1]
1248 = PIXEL_HEIGHT (f
) - f
->display
.x
->internal_border_width
1249 - current_frame
->pix_height
[FRAME_HEIGHT (f
) - 1];
1250 current_frame
->top_left_x
[0] = leftmost
;
1251 current_frame
->top_left_y
[0] = downto
;
1254 #endif /* HAVE_X_WINDOWS */
1256 /* Now update the rest of the lines. */
1257 for (i
= 0; i
< FRAME_HEIGHT (f
) - 1 && (force
|| !input_pending
); i
++)
1259 if (desired_frame
->enable
[i
])
1261 if (FRAME_TERMCAP_P (f
))
1263 /* Flush out every so many lines.
1264 Also flush out if likely to have more than 1k buffered
1265 otherwise. I'm told that some telnet connections get
1266 really screwed by more than 1k output at once. */
1267 int outq
= PENDING_OUTPUT_COUNT (stdout
);
1269 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
1272 if (preempt_count
== 1)
1274 #ifdef EMACS_OUTQSIZE
1275 if (EMACS_OUTQSIZE (0, &outq
) < 0)
1276 /* Probably not a tty. Ignore the error and reset
1277 * the outq count. */
1278 outq
= PENDING_OUTPUT_COUNT (stdout
);
1281 if (baud_rate
<= outq
&& baud_rate
> 0)
1282 sleep (outq
/ baud_rate
);
1285 if ((i
- 1) % preempt_count
== 0)
1286 detect_input_pending ();
1290 #ifdef HAVE_X_WINDOWS
1293 current_frame
->top_left_y
[i
] = downto
;
1294 current_frame
->top_left_x
[i
] = leftmost
;
1296 #endif /* HAVE_X_WINDOWS */
1299 #ifdef HAVE_X_WINDOWS
1301 downto
+= current_frame
->pix_height
[i
];
1304 pause
= (i
< FRAME_HEIGHT (f
) - 1) ? i
: 0;
1306 /* Now just clean up termcap drivers and set cursor, etc. */
1309 if (cursor_in_echo_area
1310 && FRAME_HAS_MINIBUF_P (f
))
1312 int top
= XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
);
1315 if (cursor_in_echo_area
< 0)
1322 /* If the minibuffer is several lines high, find the last
1323 line that has any text on it. */
1324 row
= FRAME_HEIGHT (f
);
1328 if (current_frame
->enable
[row
])
1329 col
= current_frame
->used
[row
];
1333 while (row
> top
&& col
== 0);
1335 if (col
>= FRAME_WIDTH (f
))
1338 if (row
< FRAME_HEIGHT (f
) - 1)
1343 cursor_to (row
, col
);
1346 cursor_to (FRAME_CURSOR_Y (f
), max (min (FRAME_CURSOR_X (f
),
1347 FRAME_WIDTH (f
) - 1), 0));
1353 fflush (termscript
);
1356 /* Here if output is preempted because input is detected. */
1359 if (FRAME_HEIGHT (f
) == 0) abort (); /* Some bug zeros some core */
1360 display_completed
= !pause
;
1362 bzero (FRAME_DESIRED_GLYPHS (f
)->enable
, FRAME_HEIGHT (f
));
1366 /* Called when about to quit, to check for doing so
1367 at an improper time. */
1372 if (FRAME_DESIRED_GLYPHS (selected_frame
) == 0)
1374 if (FRAME_DESIRED_GLYPHS (selected_frame
)->enable
[0])
1376 if (FRAME_DESIRED_GLYPHS (selected_frame
)->enable
[FRAME_HEIGHT (selected_frame
) - 1])
1380 /* Decide what insert/delete line to do, and do it */
1382 extern void scrolling_1 ();
1387 int unchanged_at_top
, unchanged_at_bottom
;
1390 int *old_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
1391 int *new_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
1392 int *draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
1393 int *old_draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
1395 int free_at_end_vpos
= FRAME_HEIGHT (frame
);
1396 register struct frame_glyphs
*current_frame
= FRAME_CURRENT_GLYPHS (frame
);
1397 register struct frame_glyphs
*desired_frame
= FRAME_DESIRED_GLYPHS (frame
);
1399 /* Compute hash codes of all the lines.
1400 Also calculate number of changed lines,
1401 number of unchanged lines at the beginning,
1402 and number of unchanged lines at the end. */
1405 unchanged_at_top
= 0;
1406 unchanged_at_bottom
= FRAME_HEIGHT (frame
);
1407 for (i
= 0; i
< FRAME_HEIGHT (frame
); i
++)
1409 /* Give up on this scrolling if some old lines are not enabled. */
1410 if (!current_frame
->enable
[i
])
1412 old_hash
[i
] = line_hash_code (current_frame
, i
);
1413 if (! desired_frame
->enable
[i
])
1414 new_hash
[i
] = old_hash
[i
];
1416 new_hash
[i
] = line_hash_code (desired_frame
, i
);
1418 if (old_hash
[i
] != new_hash
[i
])
1421 unchanged_at_bottom
= FRAME_HEIGHT (frame
) - i
- 1;
1423 else if (i
== unchanged_at_top
)
1425 draw_cost
[i
] = line_draw_cost (desired_frame
, i
);
1426 old_draw_cost
[i
] = line_draw_cost (current_frame
, i
);
1429 /* If changed lines are few, don't allow preemption, don't scroll. */
1430 if (!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400
1431 || unchanged_at_bottom
== FRAME_HEIGHT (frame
))
1434 window_size
= (FRAME_HEIGHT (frame
) - unchanged_at_top
1435 - unchanged_at_bottom
);
1437 if (scroll_region_ok
)
1438 free_at_end_vpos
-= unchanged_at_bottom
;
1439 else if (memory_below_frame
)
1440 free_at_end_vpos
= -1;
1442 /* If large window, fast terminal and few lines in common between
1443 current frame and desired frame, don't bother with i/d calc. */
1444 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
1446 10 * scrolling_max_lines_saved (unchanged_at_top
,
1447 FRAME_HEIGHT (frame
) - unchanged_at_bottom
,
1448 old_hash
, new_hash
, draw_cost
)))
1451 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
1452 draw_cost
+ unchanged_at_top
- 1,
1453 old_draw_cost
+ unchanged_at_top
- 1,
1454 old_hash
+ unchanged_at_top
- 1,
1455 new_hash
+ unchanged_at_top
- 1,
1456 free_at_end_vpos
- unchanged_at_top
);
1461 /* Return the offset in its buffer of the character at location col, line
1462 in the given window. */
1464 buffer_posn_from_coords (window
, col
, line
)
1465 struct window
*window
;
1468 int hscroll
= XINT (window
->hscroll
);
1469 int window_left
= XFASTINT (window
->left
);
1471 /* The actual width of the window is window->width less one for the
1472 DISP_CONTINUE_GLYPH, and less one if it's not the rightmost
1474 int window_width
= window_internal_width (window
) - 1;
1476 int startp
= marker_position (window
->start
);
1478 /* Since compute_motion will only operate on the current buffer,
1479 we need to save the old one and restore it when we're done. */
1480 struct buffer
*old_current_buffer
= current_buffer
;
1481 struct position
*posn
;
1483 current_buffer
= XBUFFER (window
->buffer
);
1485 /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME
1486 (window->frame))->bufp to avoid scanning from the very top of
1487 the window, but it isn't maintained correctly, and I'm not even
1488 sure I will keep it. */
1489 posn
= compute_motion (startp
, 0,
1490 (window
== XWINDOW (minibuf_window
) && startp
== 1
1491 ? minibuf_prompt_width
: 0)
1492 + (hscroll
? 1 - hscroll
: 0),
1494 window_width
, hscroll
, 0, window
);
1496 current_buffer
= old_current_buffer
;
1498 /* compute_motion considers frame points past the end of a line
1499 to be *after* the newline, i.e. at the start of the next line.
1500 This is reasonable, but not really what we want. So if the
1501 result is on a line below LINE, back it up one character. */
1502 if (posn
->vpos
> line
)
1503 return posn
->bufpos
- 1;
1505 return posn
->bufpos
;
1512 register GLYPH
*p
= r
;
1513 while (*p
++ == SPACEGLYPH
);
1518 count_match (str1
, str2
)
1521 register GLYPH
*p1
= str1
;
1522 register GLYPH
*p2
= str2
;
1523 while (*p1
++ == *p2
++);
1524 return p1
- str1
- 1;
1527 /* Char insertion/deletion cost vector, from term.c */
1528 extern int *char_ins_del_vector
;
1530 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WIDTH((f))])
1533 update_line (frame
, vpos
)
1534 register FRAME_PTR frame
;
1537 register GLYPH
*obody
, *nbody
, *op1
, *op2
, *np1
, *temp
;
1540 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
1542 register struct frame_glyphs
*current_frame
1543 = FRAME_CURRENT_GLYPHS (frame
);
1544 register struct frame_glyphs
*desired_frame
1545 = FRAME_DESIRED_GLYPHS (frame
);
1547 if (desired_frame
->highlight
[vpos
]
1548 != (current_frame
->enable
[vpos
] && current_frame
->highlight
[vpos
]))
1550 change_line_highlight (desired_frame
->highlight
[vpos
], vpos
,
1551 (current_frame
->enable
[vpos
] ?
1552 current_frame
->used
[vpos
] : 0));
1553 current_frame
->enable
[vpos
] = 0;
1556 reassert_line_highlight (desired_frame
->highlight
[vpos
], vpos
);
1558 if (! current_frame
->enable
[vpos
])
1564 obody
= current_frame
->glyphs
[vpos
];
1565 olen
= current_frame
->used
[vpos
];
1566 if (! current_frame
->highlight
[vpos
])
1568 if (!must_write_spaces
)
1569 while (obody
[olen
- 1] == SPACEGLYPH
&& olen
> 0)
1574 /* For an inverse-video line, remember we gave it
1575 spaces all the way to the frame edge
1576 so that the reverse video extends all the way across. */
1578 while (olen
< FRAME_WIDTH (frame
) - 1)
1579 obody
[olen
++] = SPACEGLYPH
;
1583 /* One way or another, this will enable the line being updated. */
1584 current_frame
->enable
[vpos
] = 1;
1585 current_frame
->used
[vpos
] = desired_frame
->used
[vpos
];
1586 current_frame
->highlight
[vpos
] = desired_frame
->highlight
[vpos
];
1587 current_frame
->bufp
[vpos
] = desired_frame
->bufp
[vpos
];
1589 #ifdef HAVE_X_WINDOWS
1590 if (FRAME_X_P (frame
))
1592 current_frame
->pix_width
[vpos
]
1593 = current_frame
->used
[vpos
]
1594 * FONT_WIDTH (frame
->display
.x
->font
);
1595 current_frame
->pix_height
[vpos
]
1596 = frame
->display
.x
->line_height
;
1598 #endif /* HAVE_X_WINDOWS */
1600 if (!desired_frame
->enable
[vpos
])
1606 nbody
= desired_frame
->glyphs
[vpos
];
1607 nlen
= desired_frame
->used
[vpos
];
1609 /* Pretend trailing spaces are not there at all,
1610 unless for one reason or another we must write all spaces. */
1611 if (! desired_frame
->highlight
[vpos
])
1613 if (!must_write_spaces
)
1614 /* We know that the previous character byte contains 0. */
1615 while (nbody
[nlen
- 1] == SPACEGLYPH
)
1620 /* For an inverse-video line, give it extra trailing spaces
1621 all the way to the frame edge
1622 so that the reverse video extends all the way across. */
1624 while (nlen
< FRAME_WIDTH (frame
) - 1)
1625 nbody
[nlen
++] = SPACEGLYPH
;
1628 /* If there's no i/d char, quickly do the best we can without it. */
1629 if (!char_ins_del_ok
)
1634 if (FRAME_X_P (frame
))
1636 /* Under X, erase everything we are going to rewrite,
1637 and rewrite everything from the first char that's changed.
1638 This is part of supporting fonts like Courier
1639 whose chars can overlap outside the char width. */
1640 for (i
= 0; i
< nlen
; i
++)
1641 if (i
>= olen
|| nbody
[i
] != obody
[i
])
1644 cursor_to (vpos
, i
);
1646 clear_end_of_line (olen
);
1647 write_glyphs (nbody
+ i
, nlen
- i
);
1652 for (i
= 0; i
< nlen
; i
++)
1654 if (i
>= olen
|| nbody
[i
] != obody
[i
]) /* A non-matching char. */
1656 cursor_to (vpos
, i
);
1657 for (j
= 1; (i
+ j
< nlen
&&
1658 (i
+ j
>= olen
|| nbody
[i
+j
] != obody
[i
+j
]));
1661 /* Output this run of non-matching chars. */
1662 write_glyphs (nbody
+ i
, j
);
1665 /* Now find the next non-match. */
1669 /* Clear the rest of the line, or the non-clear part of it. */
1672 cursor_to (vpos
, nlen
);
1673 clear_end_of_line (olen
);
1676 /* Exchange contents between current_frame and new_frame. */
1677 temp
= desired_frame
->glyphs
[vpos
];
1678 desired_frame
->glyphs
[vpos
] = current_frame
->glyphs
[vpos
];
1679 current_frame
->glyphs
[vpos
] = temp
;
1681 /* Exchange charstarts between current_frame and new_frame. */
1682 temp1
= desired_frame
->charstarts
[vpos
];
1683 desired_frame
->charstarts
[vpos
] = current_frame
->charstarts
[vpos
];
1684 current_frame
->charstarts
[vpos
] = temp1
;
1691 nsp
= (must_write_spaces
|| desired_frame
->highlight
[vpos
])
1692 ? 0 : count_blanks (nbody
);
1695 cursor_to (vpos
, nsp
);
1696 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
1699 /* Exchange contents between current_frame and new_frame. */
1700 temp
= desired_frame
->glyphs
[vpos
];
1701 desired_frame
->glyphs
[vpos
] = current_frame
->glyphs
[vpos
];
1702 current_frame
->glyphs
[vpos
] = temp
;
1704 /* Exchange charstarts between current_frame and new_frame. */
1705 temp1
= desired_frame
->charstarts
[vpos
];
1706 desired_frame
->charstarts
[vpos
] = current_frame
->charstarts
[vpos
];
1707 current_frame
->charstarts
[vpos
] = temp1
;
1716 /* Compute number of leading blanks in old and new contents. */
1717 osp
= count_blanks (obody
);
1718 if (!desired_frame
->highlight
[vpos
])
1719 nsp
= count_blanks (nbody
);
1723 /* Compute number of matching chars starting with first nonblank. */
1724 begmatch
= count_match (obody
+ osp
, nbody
+ nsp
);
1726 /* Spaces in new match implicit space past the end of old. */
1727 /* A bug causing this to be a no-op was fixed in 18.29. */
1728 if (!must_write_spaces
&& osp
+ begmatch
== olen
)
1731 while (np1
[begmatch
] == SPACEGLYPH
)
1735 /* Avoid doing insert/delete char
1736 just cause number of leading spaces differs
1737 when the following text does not match. */
1738 if (begmatch
== 0 && osp
!= nsp
)
1739 osp
= nsp
= min (osp
, nsp
);
1741 /* Find matching characters at end of line */
1744 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
1745 while (op1
> op2
&& op1
[-1] == np1
[-1])
1750 endmatch
= obody
+ olen
- op1
;
1752 /* Put correct value back in nbody[nlen].
1753 This is important because direct_output_for_insert
1754 can write into the line at a later point.
1755 If this screws up the zero at the end of the line, re-establish it. */
1759 /* tem gets the distance to insert or delete.
1760 endmatch is how many characters we save by doing so.
1763 tem
= (nlen
- nsp
) - (olen
- osp
);
1765 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (frame
)[tem
]))
1768 /* nsp - osp is the distance to insert or delete.
1769 If that is nonzero, begmatch is known to be nonzero also.
1770 begmatch + endmatch is how much we save by doing the ins/del.
1774 && (!char_ins_del_ok
1775 || begmatch
+ endmatch
<= char_ins_del_cost (frame
)[nsp
- osp
]))
1779 osp
= nsp
= min (osp
, nsp
);
1782 /* Now go through the line, inserting, writing and
1783 deleting as appropriate. */
1787 cursor_to (vpos
, nsp
);
1788 delete_glyphs (osp
- nsp
);
1792 /* If going to delete chars later in line
1793 and insert earlier in the line,
1794 must delete first to avoid losing data in the insert */
1795 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
1797 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
1798 delete_glyphs (olen
+ nsp
- osp
- nlen
);
1799 olen
= nlen
- (nsp
- osp
);
1801 cursor_to (vpos
, osp
);
1802 insert_glyphs ((char *)0, nsp
- osp
);
1806 tem
= nsp
+ begmatch
+ endmatch
;
1807 if (nlen
!= tem
|| olen
!= tem
)
1809 cursor_to (vpos
, nsp
+ begmatch
);
1810 if (!endmatch
|| nlen
== olen
)
1812 /* If new text being written reaches right margin,
1813 there is no need to do clear-to-eol at the end.
1814 (and it would not be safe, since cursor is not
1815 going to be "at the margin" after the text is done) */
1816 if (nlen
== FRAME_WIDTH (frame
))
1818 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
1822 /* the following code loses disastrously if tem == nlen.
1823 Rather than trying to fix that case, I am trying the simpler
1824 solution found above. */
1826 /* If the text reaches to the right margin,
1827 it will lose one way or another (depending on AutoWrap)
1828 to clear to end of line after outputting all the text.
1829 So pause with one character to go and clear the line then. */
1830 if (nlen
== FRAME_WIDTH (frame
) && fast_clear_end_of_line
&& olen
> nlen
)
1832 /* endmatch must be zero, and tem must equal nsp + begmatch */
1833 write_glyphs (nbody
+ tem
, nlen
- tem
- 1);
1834 clear_end_of_line (olen
);
1835 olen
= 0; /* Don't let it be cleared again later */
1836 write_glyphs (nbody
+ nlen
- 1, 1);
1839 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
1840 #endif /* OBSOLETE */
1843 else if (nlen
> olen
)
1845 write_glyphs (nbody
+ nsp
+ begmatch
, olen
- tem
);
1846 insert_glyphs (nbody
+ nsp
+ begmatch
+ olen
- tem
, nlen
- olen
);
1849 else if (olen
> nlen
)
1851 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
1852 delete_glyphs (olen
- nlen
);
1858 /* If any unerased characters remain after the new line, erase them. */
1861 cursor_to (vpos
, nlen
);
1862 clear_end_of_line (olen
);
1865 /* Exchange contents between current_frame and new_frame. */
1866 temp
= desired_frame
->glyphs
[vpos
];
1867 desired_frame
->glyphs
[vpos
] = current_frame
->glyphs
[vpos
];
1868 current_frame
->glyphs
[vpos
] = temp
;
1870 /* Exchange charstarts between current_frame and new_frame. */
1871 temp1
= desired_frame
->charstarts
[vpos
];
1872 desired_frame
->charstarts
[vpos
] = current_frame
->charstarts
[vpos
];
1873 current_frame
->charstarts
[vpos
] = temp1
;
1876 /* A vector of size >= NFRAMES + 3 * NBUFFERS + 1, containing the session's
1877 frames, buffers, buffer-read-only flags, and buffer-modified-flags,
1878 and a trailing sentinel (so we don't need to add length checks). */
1879 static Lisp_Object frame_and_buffer_state
;
1881 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
1882 Sframe_or_buffer_changed_p
, 0, 0, 0,
1883 "Return non-nil if the frame and buffer state appears to have changed.\n\
1884 The state variable is an internal vector containing all frames and buffers,\n\
1885 along with the buffers' read-only and modified flags, which allows a fast\n\
1886 check to see whether the menu bars might need to be recomputed.\n\
1887 If this function returns non-nil, it updates the internal vector to reflect\n\
1888 the current state.\n")
1891 Lisp_Object tail
, frame
, buf
;
1894 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
1895 FOR_EACH_FRAME (tail
, frame
)
1896 if (!EQ (*vecp
++, frame
))
1898 /* Check that the buffer info matches.
1899 No need to test for the end of the vector
1900 because the last element of the vector is lambda
1901 and that will always cause a mismatch. */
1902 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1904 buf
= XCONS (XCONS (tail
)->car
)->cdr
;
1905 if (!EQ (*vecp
++, buf
))
1907 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
1909 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
1912 /* Detect deletion of a buffer at the end of the list. */
1913 if (*vecp
== Qlambda
)
1916 /* Start with 1 so there is room for at least one lambda at the end. */
1918 FOR_EACH_FRAME (tail
, frame
)
1920 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1922 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
1923 if (n
> XVECTOR (frame_and_buffer_state
)->size
1924 || n
< XVECTOR (frame_and_buffer_state
)->size
/ 2)
1925 frame_and_buffer_state
= Fmake_vector (make_number (n
), Qlambda
);
1926 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
1927 FOR_EACH_FRAME (tail
, frame
)
1929 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1931 buf
= XCONS (XCONS (tail
)->car
)->cdr
;
1933 *vecp
++ = XBUFFER (buf
)->read_only
;
1934 *vecp
++ = Fbuffer_modified_p (buf
);
1936 /* If we left any slack in the vector, fill it up now. */
1937 for (; n
< XVECTOR (frame_and_buffer_state
)->size
; ++n
)
1942 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
1943 1, 1, "FOpen termscript file: ",
1944 "Start writing all terminal output to FILE as well as the terminal.\n\
1945 FILE = nil means just close any termscript file currently open.")
1949 if (termscript
!= 0) fclose (termscript
);
1954 file
= Fexpand_file_name (file
, Qnil
);
1955 termscript
= fopen (XSTRING (file
)->data
, "w");
1956 if (termscript
== 0)
1957 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
1965 window_change_signal (signalnum
) /* If we don't have an argument, */
1966 int signalnum
; /* some compilers complain in signal calls. */
1970 int old_errno
= errno
;
1972 get_frame_size (&width
, &height
);
1974 /* The frame size change obviously applies to a termcap-controlled
1975 frame. Find such a frame in the list, and assume it's the only
1976 one (since the redisplay code always writes to stdout, not a
1977 FILE * specified in the frame structure). Record the new size,
1978 but don't reallocate the data structures now. Let that be done
1979 later outside of the signal handler. */
1982 Lisp_Object tail
, frame
;
1984 FOR_EACH_FRAME (tail
, frame
)
1986 if (FRAME_TERMCAP_P (XFRAME (frame
)))
1988 change_frame_size (XFRAME (frame
), height
, width
, 0, 1);
1994 signal (SIGWINCH
, window_change_signal
);
1997 #endif /* SIGWINCH */
2000 /* Do any change in frame size that was requested by a signal. */
2002 do_pending_window_change ()
2004 /* If window_change_signal should have run before, run it now. */
2005 while (delayed_size_change
)
2007 Lisp_Object tail
, frame
;
2009 delayed_size_change
= 0;
2011 FOR_EACH_FRAME (tail
, frame
)
2013 FRAME_PTR f
= XFRAME (frame
);
2015 int height
= FRAME_NEW_HEIGHT (f
);
2016 int width
= FRAME_NEW_WIDTH (f
);
2018 if (height
!= 0 || width
!= 0)
2019 change_frame_size (f
, height
, width
, 0, 0);
2025 /* Change the frame height and/or width. Values may be given as zero to
2026 indicate no change is to take place.
2028 If DELAY is non-zero, then assume we're being called from a signal
2029 handler, and queue the change for later - perhaps the next
2030 redisplay. Since this tries to resize windows, we can't call it
2031 from a signal handler. */
2033 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
)
2034 register FRAME_PTR f
;
2035 int newheight
, newwidth
, pretend
;
2037 Lisp_Object tail
, frame
;
2038 if (FRAME_TERMCAP_P (f
))
2040 /* When using termcap, all frames use the same screen,
2041 so a change in size affects all termcap frames. */
2042 FOR_EACH_FRAME (tail
, frame
)
2043 if (FRAME_TERMCAP_P (XFRAME (frame
)))
2044 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
2048 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
);
2052 change_frame_size_1 (frame
, newheight
, newwidth
, pretend
, delay
)
2053 register FRAME_PTR frame
;
2054 int newheight
, newwidth
, pretend
;
2056 /* If we can't deal with the change now, queue it for later. */
2059 FRAME_NEW_HEIGHT (frame
) = newheight
;
2060 FRAME_NEW_WIDTH (frame
) = newwidth
;
2061 delayed_size_change
= 1;
2065 /* This size-change overrides any pending one for this frame. */
2066 FRAME_NEW_HEIGHT (frame
) = 0;
2067 FRAME_NEW_WIDTH (frame
) = 0;
2069 /* If an argument is zero, set it to the current value. */
2070 newheight
|| (newheight
= FRAME_HEIGHT (frame
));
2071 newwidth
|| (newwidth
= FRAME_WIDTH (frame
));
2073 /* Round up to the smallest acceptable size. */
2074 check_frame_size (frame
, &newheight
, &newwidth
);
2076 /* If we're not changing the frame size, quit now. */
2077 if (newheight
== FRAME_HEIGHT (frame
)
2078 && newwidth
== FRAME_WIDTH (frame
))
2081 if (newheight
!= FRAME_HEIGHT (frame
))
2083 if (FRAME_HAS_MINIBUF_P (frame
)
2084 && ! FRAME_MINIBUF_ONLY_P (frame
))
2086 /* Frame has both root and minibuffer. */
2087 set_window_height (FRAME_ROOT_WINDOW (frame
),
2088 newheight
- 1 - FRAME_MENU_BAR_LINES (frame
), 0);
2089 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame
))->top
,
2091 set_window_height (FRAME_MINIBUF_WINDOW (frame
), 1, 0);
2094 /* Frame has just one top-level window. */
2095 set_window_height (FRAME_ROOT_WINDOW (frame
),
2096 newheight
- FRAME_MENU_BAR_LINES (frame
), 0);
2098 if (FRAME_TERMCAP_P (frame
) && !pretend
)
2099 FrameRows
= newheight
;
2102 if (frame
->output_method
== output_termcap
)
2104 frame_height
= newheight
;
2106 FrameRows
= newheight
;
2111 if (newwidth
!= FRAME_WIDTH (frame
))
2113 set_window_width (FRAME_ROOT_WINDOW (frame
), newwidth
, 0);
2114 if (FRAME_HAS_MINIBUF_P (frame
))
2115 set_window_width (FRAME_MINIBUF_WINDOW (frame
), newwidth
, 0);
2117 if (FRAME_TERMCAP_P (frame
) && !pretend
)
2118 FrameCols
= newwidth
;
2120 if (frame
->output_method
== output_termcap
)
2122 frame_width
= newwidth
;
2124 FrameCols
= newwidth
;
2129 FRAME_HEIGHT (frame
) = newheight
;
2130 FRAME_WIDTH (frame
) = newwidth
;
2132 if (FRAME_CURSOR_X (frame
) >= FRAME_WIDTH (frame
))
2133 FRAME_CURSOR_X (frame
) = FRAME_WIDTH (frame
) - 1;
2134 if (FRAME_CURSOR_Y (frame
) >= FRAME_HEIGHT (frame
))
2135 FRAME_CURSOR_Y (frame
) = FRAME_HEIGHT (frame
) - 1;
2137 remake_frame_glyphs (frame
);
2138 calculate_costs (frame
);
2141 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
2142 Ssend_string_to_terminal
, 1, 1, 0,
2143 "Send STRING to the terminal without alteration.\n\
2144 Control characters in STRING will have terminal-dependent effects.")
2148 CHECK_STRING (str
, 0);
2149 fwrite (XSTRING (str
)->data
, 1, XSTRING (str
)->size
, stdout
);
2153 fwrite (XSTRING (str
)->data
, 1, XSTRING (str
)->size
, termscript
);
2154 fflush (termscript
);
2159 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
2160 "Beep, or flash the screen.\n\
2161 Also, unless an argument is given,\n\
2162 terminate any keyboard macro currently executing.")
2184 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
2185 error ("Keyboard macro terminated by a command ringing the bell");
2191 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
2192 "Pause, without updating display, for SECONDS seconds.\n\
2193 SECONDS may be a floating-point value, meaning that you can wait for a\n\
2194 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
2195 additional wait period, in milliseconds; this may be useful if your\n\
2196 Emacs was built without floating point support.\n\
2197 \(Not all operating systems support waiting for a fraction of a second.)")
2198 (seconds
, milliseconds
)
2199 Lisp_Object seconds
, milliseconds
;
2203 if (NILP (milliseconds
))
2204 XSETINT (milliseconds
, 0);
2206 CHECK_NUMBER (milliseconds
, 1);
2207 usec
= XINT (milliseconds
) * 1000;
2209 #ifdef LISP_FLOAT_TYPE
2211 double duration
= extract_float (seconds
);
2212 sec
= (int) duration
;
2213 usec
+= (duration
- sec
) * 1000000;
2216 CHECK_NUMBER (seconds
, 0);
2217 sec
= XINT (seconds
);
2220 #ifndef EMACS_HAS_USECS
2221 if (sec
== 0 && usec
!= 0)
2222 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
2225 /* Assure that 0 <= usec < 1000000. */
2228 /* We can't rely on the rounding being correct if user is negative. */
2229 if (-1000000 < usec
)
2230 sec
--, usec
+= 1000000;
2232 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
2235 sec
+= usec
/ 1000000, usec
%= 1000000;
2243 XSETFASTINT (zero
, 0);
2244 wait_reading_process_input (sec
, usec
, zero
, 0);
2247 /* We should always have wait_reading_process_input; we have a dummy
2248 implementation for systems which don't support subprocesses. */
2250 /* No wait_reading_process_input */
2257 /* The reason this is done this way
2258 (rather than defined (H_S) && defined (H_T))
2259 is because the VMS preprocessor doesn't grok `defined' */
2261 EMACS_GET_TIME (end_time
);
2262 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
2263 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2267 EMACS_GET_TIME (timeout
);
2268 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2269 if (EMACS_TIME_NEG_P (timeout
)
2270 || !select (1, 0, 0, 0, &timeout
))
2273 #else /* not HAVE_SELECT */
2275 #endif /* HAVE_SELECT */
2276 #endif /* not VMS */
2279 #endif /* no subprocesses */
2284 /* This is just like wait_reading_process_input, except that
2285 it does the redisplay.
2287 It's also much like Fsit_for, except that it can be used for
2288 waiting for input as well. One differnce is that sit_for
2289 does not call prepare_menu_bars; Fsit_for does call that. */
2292 sit_for (sec
, usec
, reading
, display
)
2293 int sec
, usec
, reading
, display
;
2295 Lisp_Object read_kbd
;
2297 if (detect_input_pending ())
2301 redisplay_preserve_echo_area ();
2303 if (sec
== 0 && usec
== 0)
2310 XSETINT (read_kbd
, reading
? -1 : 1);
2311 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
2314 /* wait_reading_process_input should always be available now; it is
2315 simulated in a simple way on systems that don't support
2318 /* No wait_reading_process_input available. */
2324 input_wait_timeout (XINT (arg
));
2326 #ifndef HAVE_TIMEVAL
2328 select (1, &waitchannels
, 0, 0, &timeout_sec
);
2329 #else /* HAVE_TIMEVAL */
2330 timeout
.tv_sec
= sec
;
2331 timeout
.tv_usec
= usec
;
2332 select (1, &waitchannels
, 0, 0, &timeout
);
2333 #endif /* HAVE_TIMEVAL */
2334 #endif /* not VMS */
2339 return detect_input_pending () ? Qnil
: Qt
;
2342 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
2343 "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\
2344 SECONDS may be a floating-point value, meaning that you can wait for a\n\
2345 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
2346 additional wait period, in milliseconds; this may be useful if your\n\
2347 Emacs was built without floating point support.\n\
2348 \(Not all operating systems support waiting for a fraction of a second.)\n\
2349 Optional third arg non-nil means don't redisplay, just wait for input.\n\
2350 Redisplay is preempted as always if input arrives, and does not happen\n\
2351 if input is available before it starts.\n\
2352 Value is t if waited the full time with no input arriving.")
2353 (seconds
, milliseconds
, nodisp
)
2354 Lisp_Object seconds
, milliseconds
, nodisp
;
2358 if (NILP (milliseconds
))
2359 XSETINT (milliseconds
, 0);
2361 CHECK_NUMBER (milliseconds
, 1);
2362 usec
= XINT (milliseconds
) * 1000;
2364 #ifdef LISP_FLOAT_TYPE
2366 double duration
= extract_float (seconds
);
2367 sec
= (int) duration
;
2368 usec
+= (duration
- sec
) * 1000000;
2371 CHECK_NUMBER (seconds
, 0);
2372 sec
= XINT (seconds
);
2375 #ifndef EMACS_HAS_USECS
2376 if (usec
!= 0 && sec
== 0)
2377 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
2381 prepare_menu_bars ();
2382 return sit_for (sec
, usec
, 0, NILP (nodisp
));
2385 char *terminal_type
;
2387 /* Initialization done when Emacs fork is started, before doing stty. */
2388 /* Determine terminal type and set terminal_driver */
2389 /* Then invoke its decoding routine to set up variables
2390 in the terminal package */
2394 #ifdef HAVE_X_WINDOWS
2395 extern int display_arg
;
2400 cursor_in_echo_area
= 0;
2401 terminal_type
= (char *) 0;
2403 /* Now is the time to initialize this; it's used by init_sys_modes
2405 Vwindow_system
= Qnil
;
2407 /* If the user wants to use a window system, we shouldn't bother
2408 initializing the terminal. This is especially important when the
2409 terminal is so dumb that emacs gives up before and doesn't bother
2410 using the window system.
2412 If the DISPLAY environment variable is set, try to use X, and die
2413 with an error message if that doesn't work. */
2415 #ifdef HAVE_X_WINDOWS
2419 display_arg
= (getenv ("DECW$DISPLAY") != 0);
2421 display_arg
= (getenv ("DISPLAY") != 0);
2425 if (!inhibit_window_system
&& display_arg
)
2427 Vwindow_system
= intern ("x");
2429 Vwindow_system_version
= make_number (11);
2431 Vwindow_system_version
= make_number (10);
2435 #endif /* HAVE_X_WINDOWS */
2437 /* If no window system has been specified, try to use the terminal. */
2440 fprintf (stderr
, "emacs: standard input is not a tty\n");
2444 /* Look at the TERM variable */
2445 terminal_type
= (char *) getenv ("TERM");
2449 fprintf (stderr
, "Please specify your terminal type.\n\
2450 For types defined in VMS, use set term /device=TYPE.\n\
2451 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
2452 \(The quotation marks are necessary since terminal types are lower case.)\n");
2454 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
2460 /* VMS DCL tends to upcase things, so downcase term type.
2461 Hardly any uppercase letters in terminal types; should be none. */
2463 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
2466 strcpy (new, terminal_type
);
2468 for (p
= new; *p
; p
++)
2472 terminal_type
= new;
2476 term_init (terminal_type
);
2478 remake_frame_glyphs (selected_frame
);
2479 calculate_costs (selected_frame
);
2481 /* X and Y coordinates of the cursor between updates. */
2482 FRAME_CURSOR_X (selected_frame
) = 0;
2483 FRAME_CURSOR_Y (selected_frame
) = 0;
2488 #endif /* CANNOT_DUMP */
2489 signal (SIGWINCH
, window_change_signal
);
2490 #endif /* SIGWINCH */
2496 defsubr (&Sredraw_frame
);
2498 defsubr (&Sredraw_display
);
2499 defsubr (&Sframe_or_buffer_changed_p
);
2500 defsubr (&Sopen_termscript
);
2502 defsubr (&Ssit_for
);
2503 defsubr (&Ssleep_for
);
2504 defsubr (&Ssend_string_to_terminal
);
2506 frame_and_buffer_state
= Fmake_vector (make_number (1), Qlambda
);
2507 staticpro (&frame_and_buffer_state
);
2509 DEFVAR_INT ("baud-rate", &baud_rate
,
2510 "*The output baud rate of the terminal.\n\
2511 On most systems, changing this value will affect the amount of padding\n\
2512 and the other strategic decisions made during redisplay.");
2513 DEFVAR_BOOL ("inverse-video", &inverse_video
,
2514 "*Non-nil means invert the entire frame display.\n\
2515 This means everything is in inverse video which otherwise would not be.");
2516 DEFVAR_BOOL ("visible-bell", &visible_bell
,
2517 "*Non-nil means try to flash the frame to represent a bell.");
2518 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
2519 "*Non-nil means no need to redraw entire frame after suspending.\n\
2520 A non-nil value is useful if the terminal can automatically preserve\n\
2521 Emacs's frame display when you reenter Emacs.\n\
2522 It is up to you to set this variable if your terminal can do that.");
2523 DEFVAR_LISP ("window-system", &Vwindow_system
,
2524 "A symbol naming the window-system under which Emacs is running\n\
2525 \(such as `x'), or nil if emacs is running on an ordinary terminal.");
2526 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
2527 "The version number of the window system in use.\n\
2528 For X windows, this is 10 or 11.");
2529 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
2530 "Non-nil means put cursor in minibuffer, at end of any message there.");
2531 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
2532 "Table defining how to output a glyph code to the frame.\n\
2533 If not nil, this is a vector indexed by glyph code to define the glyph.\n\
2534 Each element can be:\n\
2535 integer: a glyph code which this glyph is an alias for.\n\
2536 string: output this glyph using that string (not impl. in X windows).\n\
2537 nil: this glyph mod 256 is char code to output,\n\
2538 and this glyph / 256 is face code for X windows (see `face-id').");
2539 Vglyph_table
= Qnil
;
2541 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
2542 "Display table to use for buffers that specify none.\n\
2543 See `buffer-display-table' for more information.");
2544 Vstandard_display_table
= Qnil
;
2546 /* Initialize `window-system', unless init_display already decided it. */
2551 Vwindow_system
= Qnil
;
2552 Vwindow_system_version
= Qnil
;